Rearranging date format thru a new datastream

so let's say you have 'due Date' and you want to see it in week-year format.. ex "2-2022" or 54 - 2022. One of the ways it can be achieved ,in addition to dashboaard xmd?  is to use multi datastream. In example below, the q2 datastream  highlights the ww-yyyy format.
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q = load "TaskWithDetails";
q = group q by ('ActivityDate_Year', 'ActivityDate_Week');
q = foreach q generate 'ActivityDate_Year' + "~~~" + 'ActivityDate_Week' as 'ActivityDate_Year~~~ActivityDate_Week', 'ActivityDate_Week' + "~~~" + 'ActivityDate_Year' as 'ActivityDate_Week~~~ActivityDate_Year',count() as 'count';
q = order q by 'ActivityDate_Year~~~ActivityDate_Week' asc;
q2 = foreach q generate 'ActivityDate_Week~~~ActivityDate_Year' as 'ActivityDate_Week~~~ActivityDate_Year', count() as 'count';